Internal-combustion engines – Charge forming device – Auxiliary control of carburetor fuel metering
Patent
1980-04-16
1983-12-27
Cox, Ronald B.
Internal-combustion engines
Charge forming device
Auxiliary control of carburetor fuel metering
123437, 123439, 261 30, 261 41D, 261 78R, 261DIG39, F02B 3300, F02M 700
Patent
active
044224230
ABSTRACT:
A jet control type carburetor according to the present invention includes an intake pipe having an intake passage formed in an inner wall thereof, the intake passage allowing an intake air to flow therethrough; a venturi provided in the intake pipe, for controlling flow velocity and pressure of the intake air in the intake passage; a fuel nozzle opened into the intake passage and connected to a fuel supply source through a fuel passage for sucking the fuel within the intake passage from the fuel nozzle in order to introduce the mixture of air and fuel within the intake passage; a throttle valve provided downstream of the venturi, for controlling the flow rate of the mixture of intake air and fuel; a control fluid nozzle opened into the intake passage and connected to a fluid supply source through a control fluid passage for jetting the flow of the control fluid to the fuel spurted from the fuel nozzle to afford the kinetic energy of the control fluid to the fuel, and a throttle means provided upstream of the control fluid nozzle in the control fluid passage, for controlling the flow rate of the control fluid; whereby the fuel flow rate and the mixing condition of the fuel and the air are controlled with high stability and response by the kinetic energy of the control fluid so that the exhaust gas purification and the fuel consumption are improved by controlling accurately the air-fuel ratio of the intake mixture.
REFERENCES:
patent: 2541316 (1951-02-01), Winkler
patent: 2595720 (1952-05-01), Snyder
patent: 3347536 (1967-10-01), Sutton
patent: 3841283 (1974-10-01), Wood
patent: 3921612 (1975-11-01), Aono
patent: 4023357 (1977-05-01), Masaki
patent: 4036186 (1977-07-01), Hattori et al.
patent: 4091783 (1978-05-01), Laprade
Fujikake Kenji
Idota Yoshinori
Ohsawa Katsuyuki
Sugiyama Katsuhiko
Cox Ronald B.
Kabushiki Kaisha Toyota Chuo Kenyusho
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